<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        // 下面是嵌套赋值的例子。

        let obj = {};
        let arr = [];

        ({ foo: obj.prop, bar: arr[0] } = { foo: 123, bar: true });

        obj // {prop:123}
        arr // [true]
        // 
    </script>
</body>

</html>